B01D 2259/4541
For portable use
Official title: for portable use, e.g. gas masks
B01D2259/4541 (For portable use) appears on 360 US grants and 454 published applications in this corpus.
Search patents in B01D- Granted patents
- 360
- Published applications
- 454
- Assignees
- 244
- Inventors
- 846
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 5 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 4 | 0 |
| 1998 | 3 | 0 |
| 1999 | 5 | 0 |
| 2000 | 9 | 0 |
| 2001 | 3 | 3 |
| 2002 | 4 | 7 |
| 2003 | 12 | 7 |
| 2004 | 10 | 10 |
| 2005 | 6 | 20 |
| 2006 | 8 | 13 |
| 2007 | 11 | 12 |
| 2008 | 13 | 18 |
| 2009 | 7 | 14 |
| 2010 | 12 | 15 |
| 2011 | 10 | 19 |
| 2012 | 13 | 16 |
| 2013 | 14 | 17 |
| 2014 | 9 | 17 |
| 2015 | 11 | 22 |
| 2016 | 16 | 10 |
| 2017 | 12 | 18 |
| 2018 | 16 | 17 |
| 2019 | 9 | 18 |
| 2020 | 20 | 29 |
| 2021 | 16 | 39 |
| 2022 | 22 | 22 |
| 2023 | 14 | 37 |
| 2024 | 21 | 14 |
| 2025 | 16 | 17 |
| 2026 | 9 | 23 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Filter unit with a filter block, a damping layer and a housing, and process of manufacturing such a filter unit6 Oct 2026US 12,752,136 B2Dräger Safety AG & Co. KGaA
- Compact portable oxygen concentrator18 Aug 2026US 12,710,121 B2Inogen, Inc.
- Regenerable carbon dioxide scrubber23 Jun 2026US 12,661,478 B2The Johns Hopkins University
- Household oxygen generator19 May 2026US 12,629,628 B2Shenzhen Harveymed Technology Co., LTD.
- System and method for concentrating gas7 Apr 2026US 12,594,524 B2Ventec Life Systems, Inc.
- Exhaled breath capture modules and substrate-based probes for monitoring proteolysis activity3 Sep 2026US 2026/0259181 A1Zeteo Tech, Inc.
- Drying disiccant material of a dehumidifying unit27 Aug 2026US 2026/0249237 A1Koninklijke Philips N. V.
- Vaping device with integrated smoke neutralization13 Aug 2026US 2026/0232033 A1Mc Holdings US LLC
- Device and method of producing hypoxic/hyperoxic/normoxic gas mixtures13 Aug 2026US 2026/0232943 A1Z+ Health Srl
- Vaping device with integrated smoke neutralization6 Aug 2026US 2026/0223940 A1Mc Holdings US LLC
Most cited
By later US patents
- Portable oxygen concentration system and method of using the same310US 6,651,658 B1SeQual Technologies, Inc. · 2003
- Portable oxygen concentration system and method of using the same223US 6,691,702 B2SeQual Technologies, Inc. · 2004
- Microcomponent assembly for efficient contacting of fluid191US 6,126,723 ABattelle Memorial Institute · 2000
- High frequency pressure swing adsorption186US 6,176,897 B1Questor Industries Inc. · 2001
- Portable oxygen concentration system and method of using the same182US 6,629,525 B2SeQual Technologies, Inc. · 2003